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Ryan Cross

@scienceboss.bsky.social
89 followers 26 following 211 posts

Senior Science Correspondent at Endpoints News. Reach out privately on Signal: RyanCross.25

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Ryan Cross @scienceboss.bsky.social · 07/10/2026
Bexorg is using its brain-rebooting technology to study drugs before they are tested in living humans. My deep dive I wrote for Endpoints last year gets into the scientific, ethical and businsess details: endpoints.news/rebooting-de...
endpoints.news
Exclusive: Rebooting dead human brains, a biotech startup seeks to reinvent early drug testing work
Startup Bexorg, led by Zvonimir Vrselja, keeps human brains alive to test drugs. Their BrainEx system sustains brain cells for 24 hours to improve drug development and reduce animal testing.
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Ryan Cross @scienceboss.bsky.social · 07/10/2026
Bexorg got a $28M ARPA-H award to run longer tests on ‘rebooted’ human brains (don't call them "alive") obtained from organ donors. Last year, they were limiting most tests to 24 hours. Now they will try to keep the brains running for two weeks. endpoints.news/bexorg-gets-...
endpoints.news
Bexorg gets $28M ARPA-H award to run longer tests on ‘rebooted’ human brains
Bexorg wins $28.3M ARPA-H award to keep human donor brains alive up to 2 weeks for drug testing. Co-founded by Yale's Nenad Sestan and CEO Zvonimir Vrselja.
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Ryan Cross @scienceboss.bsky.social · 02/10/2026
David Sinclair has developed a version of epigenetic reprogramming that uses a cocktail of small molecules instead of a gene therapy encoding transcription factors. The work was presented for the first time to a packed room at #ARDD yesterday. My story in @endpts.com: endpoints.news/david-sincla...
endpoints.news
David Sinclair's latest salvo aims to stall aging with a pill
The Harvard lab of David Sinclair discusses a chemical cocktail it named SL-100 which, delivered in pill form, restored youthful gene expression in brain organoids and extended healthy lifespan in nor...
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Ryan Cross @scienceboss.bsky.social · 29/09/2026
Cambridge, MA-based gene editing company Beam Therapeutics sues Shanghai-based YolTech and US-based Serapha Bio for stealing its gene editing and lipid nanoparticle tech, a claim that Serapha and YolTech deny. My story for @endpts.com has the details: endpoints.news/beam-sues-yo...
endpoints.news
Beam sues YolTech and Serapha Bio for allegedly stealing its gene editing tech
Beam Therapeutics sued YolTech's Yuxuan Wu & Zi Jun Wang and Serapha Bio for allegedly stealing trade secrets related to CRISPR base editing & lipid nanoparticle tech.
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Ryan Cross @scienceboss.bsky.social · 28/09/2026
In case you missed it last week, @andrewedunn.bsky.social has a must-read story about one mother who fought for access to Vertex's cystic fibrosis drug Trikafta to begin taking the pills before her daughter was born. endpoints.news/in-a-changed...
endpoints.news
In a changed world for cystic fibrosis, a family's fight reveals a new gap in care
Drugs like Trikafta, first approved in 2019, have changed cystic fibrosis from a death sentence to a manageable chronic condition for the vast majority of patients. But the drug is only approved for c...
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
The company has raised about $80 million so far and is raising more to scale up its operations. The timing is good, because the FDA is placing a greater emphasis on methods to reduce or replace animal testing. Read more about the company's technology and ambitions in my profile
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
Vivodyne showed me videos of experimental CAR-T cell therapies migrating out of lab grown blood vessels into nearby tumors. Another set of experiments with lab grown bone marrow is helping the startup’s pharma partners screen cancer drugs to eliminate ones with toxic side effects
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
The company has built machines that grow thousands of tidbits of vascularized human tissue — each one the size of a large grain of rice and housed in microfluidic wells. There are vast potential applications in drug screening and basic biology.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
Drug development has a lab-to-clinic translation problem. Therapies that look great in cell or animal experiments routinely fail in people. Vivodyne, one of our Endpoints 11 winners this year, wants to change that by testing drugs in lab-grown human tissue endpoints.news/endpoints-11... @endpts.com
endpoints.news
Endpoints 11: Vivodyne’s human tissue factory could change how drugs are tested before they reach patients
Vivodyne, backed by about $80M, grows vascularized human tissues to screen drugs as the FDA and NIH push alternatives to animal testing.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
There are a lot of questions about how well this technique will work in people. The field of non-viral DNA delivery is littered with once promising ideas. But this startup has the firepower ($125 million raised earlier this year) to actually put its wild idea to the test.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
It doesn’t sound real, I know, but the technique seems to work astonishingly well in monkeys, boosting the giant muscle protein, dystrophin, to nearly 300% of its normal levels. A clinical trial for Duchenne muscular dystrophy is planned for mid-2027.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
The technique starts with an infusion of microbubbles and DNA. The company then uses finely tuned soundwaves, emitted from an ultrasound machine, to pop those bubbles, which creates temporary holes in cells, allowing the DNA to enter.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
It's been a tough few years for gene therapy. Sonothera's bold new idea for how to safely deliver large genes into cells, using an ultrasound based approach instead of viruses, has put it on the Endpoints 11 list year. @endpts.com endpoints.news/endpoints-11...
endpoints.news
Endpoints 11: SonoThera is making waves in a bold new approach to non-viral gene therapy
Endpoints 11: SonoThera is using ultrasound and microbubbles to push full-length dystrophin into muscle, with a $125M Series B and a 2027 trial.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
Former Genentech cancer immunology leader Ira Mellman is also a cofounder and CSO. Scientific cofounders include Carl June, Drew Weissman, George Church and Michael Snyder. Many more details in the story. This is one to watch in the cancer immunotherapy space.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
The startup was cofounded by CMO Nicholas Restifo, who studied TILs with immunotherapy pioneer Steven Rosenberg for decades, and CEO Denitsa Milanova, who worked on cell rejuvenation with Harvard geneticist George Church.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
The company believes that tapping into the immune response that the patient has already established, rather than creating a new one, will give better results, especially when treating cancers that have already spread.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
Medici will use a custom mRNA vaccine to help amplify and isolate rare tumor-targeting cells in the lab. And it has a cell rejuvenation technique to keep the T cells from becoming exhausted. After the cells are reinfused, booster shots will further expand them in the body.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
The company builds on decades of work trying to harness tumor infiltrating lymphocytes (TILs). These cancer-targeting cells are incredibly rare and often become overwhelmed before making a dent in the disease. Medici thinks a vaccine will help.
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Ryan Cross @scienceboss.bsky.social · 25/09/2026
Excited to introduce Medici Therapeutics as part of our Endpoints 11 this year. The company has raised $85M from ARCH Venture Partners to combine cell therapies and personalized cancer vaccines to get immunotherapy to work for tough-to-treat cancers. endpoints.news/endpoints-11...
endpoints.news
Endpoints 11: Science superstar-backed Medici Therapeutics believes the future of cancer therapy must be highly personalized
Endpoints 11: ARCH-backed Medici Therapeutics is pairing personalized mRNA cancer vaccines with TIL cell therapy, with $50M+ more coming in a Series A.
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Ryan Cross @scienceboss.bsky.social · 22/09/2026
Drew and my colleagues @andrewedunn.bsky.social, @leileiwu.bsky.social and @kylelahucik.bsky.social will be in Boston to announce the winners at our E11 event on Thursday night. Profiles of the companies, full of new details, will go online the following morning. Stay tuned!
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Ryan Cross @scienceboss.bsky.social · 22/09/2026
Months of debate and discussion went into this list, but we've narrowed down dozens of contenders to our top 11. It's a great lineup with some names that will surprise, and some that you’ve probably never heard of.
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Ryan Cross @scienceboss.bsky.social · 22/09/2026
That's partly due to the tendency towards secrecy that's swept through the industry, and also because biotech investors are increasingly focused on backing startups with clinically-derisked assets instead of funding ones with high risk and highly novel science.
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Ryan Cross @scienceboss.bsky.social · 22/09/2026
The science behind many these startups is promising, but far from a sure thing. We look for companies that will could attract followers if they are successful, and leave a crater if they fail. As @drewsnews.bsky.social recently noted, picking this year's list was harder than ever.
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Ryan Cross @scienceboss.bsky.social · 22/09/2026
Later this week, we will announce the winners of #Endpoints11, our list of the most exciting biotech startups of the past year. This is one of my favorite annual traditions at @endpts.com because it showcases what the future of the drug industry could look like. endpoints.news/the-endpoint...
endpoints.news
The most exciting biotech startups of 2026: How we selected this year's list
Endpoints Executive Editor Drew Armstrong on why picking the 2026 Endpoints 11 was the hardest yet, and what to expect at the Sept. 24 Boston gala.
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Ryan Cross @scienceboss.bsky.social · 16/09/2026
Scientists bred mice missing key parts of their brains (the cortex and hippocampus) to make room for human neurons to grow in their place. Researchers hope the humanized rodents will help us understand and treat brain diseases @karenweintraub.bsky.social has the story endpoints.news/researchers-...
endpoints.news
Mice with human brain cells open a new testing ground for drugmakers to study disease
Stanford's Sergiu Pasca bred mice lacking cortex/hippocampus for the first time, replacing cells with human neurons, aiding neuropsychiatric research including frontotemporal dementia and autism.
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Ryan Cross @scienceboss.bsky.social · 02/09/2026
The deaths of two children in China who received #CRISPR therapies delivered by #AAV are reigniting the debate over whether gene editing tools should ever be packaged into viruses, and the safety of AAV writ large. More in my deep dive for @endpts.com: endpoints.news/china-deaths...
endpoints.news
China deaths reignite debate about using viruses to deliver CRISPR therapies
Two pediatric deaths in Chinese CRISPR trials reignite debate over AAV delivery risks, as many of the 15 genetic-medicine experts Endpoints spoke with point to high viral doses rather than gene editin...
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Ryan Cross @scienceboss.bsky.social · 02/09/2026
Typewriter Tx has raised $56M for its RNA-based jumping gene (retrotransposon) technology for gene insertion, with an initial focus on genetic liver disease and in vivo CAR-T therapies. Read more in my exclusive for @endpts.com: endpoints.news/typewriter-r...
endpoints.news
Exclusive: Typewriter raises $56M for jumping-gene tech, in vivo CAR-T
Typewriter Therapeutics raises $56M Series A to build RNA-based jumping-gene therapies for in vivo CAR-T and genetic liver disease.
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Ryan Cross @scienceboss.bsky.social · 01/09/2026
ARPA-H grants up to $125M for making custom RNA therapies on demand, with applications in gene editing and cancer vaccines. One of the recipients is Waterfall Scientific, cofounded by former Moderna CSO Melissa Moore. Details in my story for @endpts.com: endpoints.news/arpa-h-award...
endpoints.news
ARPA-H awards $125M for manufacturing custom RNA therapies on demand
ARPA-H awards up to $125M across 5 teams, including Waterfall Scientific, to build automated systems that can make personalized RNA medicines in under a week.
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Ryan Cross @scienceboss.bsky.social · 26/08/2026
FDA approves Revolution Medicines' pancreatic cancer drug. @leileiwu.bsky.social has the story for @endpts.com - endpoints.news/fda-approves...
endpoints.news
FDA approves Revolution Medicines' pancreatic cancer drug, ushering in new era of KRAS therapy
FDA approves Revolution Medicines' daraxonrasib (Rasonque) for second-line pancreatic cancer, after it nearly doubled survival in a Phase 3 to 13.2 months vs. 6.7 months on chemo.
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Ryan Cross @scienceboss.bsky.social · 26/08/2026
In January, Aurora Therapeutics launched as the first startup dedicated to custom CRISPR therapies. But now its CEO, longtime rare disease leader Ed Kaye, has left and its dropped its lead program for PKU. More details in my story for @endpts.com: endpoints.news/an-uncertain...
endpoints.news
An uncertain future for Aurora, the first startup dedicated to custom CRISPR therapies
Aurora Therapeutics, the first bespoke CRISPR startup, lays off staff and drops its PKU program as CEO Ed Kaye exits, months after a $16M seed round.
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Ryan Cross @scienceboss.bsky.social · 21/08/2026
Three deaths in China's investigator-initiated trials, recently revealed by @science.org + @retractionwatch.com, @statnews.com, and @endpts.com have led US lawmakers to ask the FDA to increase its scrutiny of clinical data from China, @maxbayer.bsky.social reports: endpoints.news/china-iit-de...
endpoints.news
Exclusive: Two GOP lawmakers call on FDA to increase scrutiny of Chinese trial data following deaths
GOP Reps. Moolenaar & Cline urge FDA's Diamantas to reject Chinese clinical trial data unless sites are audited annually, citing patient safety risks & 3 deaths.
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Ryan Cross @scienceboss.bsky.social · 20/08/2026
On Tuesday, we reported a previously undisclosed death in RiboX's clinical trial of a cutting edge in vivo CAR-T therapy. That was the third death that journalists brought to light in a matter of weeks following earlier reports from Science and STAT. Read more here: endpoints.news/exclusive-th...
endpoints.news
Exclusive: Third death in China's popular but opaque trials revealed, this time in CAR-T
RiboX confirms a patient died in its unregulated China trial for RXIM002, an in vivo CAR-T therapy — the third such disclosed death in recent weeks.
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Ryan Cross @scienceboss.bsky.social · 20/08/2026
Three deaths have shaken trust in China's light-touch clinical trial system. It “should serve as an intense warning signal of what can happen when you strip away oversight in the name of speed,” @hollylynchez.bsky.social told me More in my deep dive for @endpts.com endpoints.news/three-deaths...
endpoints.news
Three deaths in China shake trust in the country's speedy clinical trial system
China’s cheap, fast and quiet system for testing cutting-edge medicines is facing scrutiny after the deaths of three people in investigator-initiated trials.
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Ryan Cross @scienceboss.bsky.social · 18/08/2026
Exclusive: A man with an autoimmune disease died after receiving RiboX's "in vivo CAR-T therapy" in China's popular but little-regulated investigator-initiated trials. My story for @endpts.com has the details: endpoints.news/exclusive-th... Have a tip? Contact me on Signal: RyanCross.25
endpoints.news
Exclusive: Third death in China's popular but opaque trials revealed, this time in CAR-T
RiboX confirms a patient died in its unregulated China trial for RXIM002, an in vivo CAR-T therapy — the third such disclosed death in recent weeks.
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Ryan Cross @scienceboss.bsky.social · 17/07/2026
Several epidemiology studies suggest that #shingles vaccines can reduce the risk of #Alzheimers. Now GSK is running a 33,600-person clinical trial to see if its #Shingrix vaccine can prevent dementia. Read more in my latest for @endpts.com: endpoints.news/gsk-plans-la... #AAIC26
endpoints.news
Can the shingles vaccine prevent Alzheimer’s? GSK has a big study to find out
GSK has launched a 33,600-person Finland trial of Shingrix to test if shingles vaccine reduces dementia risk in those 76+.
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Ryan Cross @scienceboss.bsky.social · 16/07/2026
Two years ago, Betty Tijms discovered five distinct subtypes of #Alzheimers disease based on proteins found in spinal fluid. At #AAIC26, she told me its time for drugmakers to stop treating Alzheimer’s as a single disease. Read more in my Q&A in @endpts: endpoints.news/qa-betty-tij...
endpoints.news
Q&A: Betty Tijms says it’s time to stop treating Alzheimer’s as a single disease
We interview Betty Tijms of Alzheimer Center Amsterdam, who has identified 5 Alzheimer's subtypes and urges drugmakers to treat the condition as multiple diseases for better trials.
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Ryan Cross @scienceboss.bsky.social · 16/07/2026
Two years ago, Betty Tijms discovered five distinct subtypes of #Alzheimers disease based on proteins found in spinal fluid. At #AAIC26, she told me its time for drugmakers to stop treating Alzheimer’s as a single disease. Read more in my Q&A in @endpts.com: endpoints.news/qa-betty-tij...
endpoints.news
Q&A: Betty Tijms says it’s time to stop treating Alzheimer’s as a single disease
We interview Betty Tijms of Alzheimer Center Amsterdam, who has identified 5 Alzheimer's subtypes and urges drugmakers to treat the condition as multiple diseases for better trials.
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Ryan Cross @scienceboss.bsky.social · 15/07/2026
Nava Therapeutics, a startup led by former Spark Therapeutics science leader Federico Mingozzi, has emerged from stealth with $89 million to develop in vivo CAR-T therapies, plus LNPs that target the kidney. My exclusive for @endpts.com has the details: endpoints.news/nava-therape...
endpoints.news
Exclusive: Lipid nanoparticle startup Nava emerges with $89M to target T cells and kidney
Nava Therapeutics discloses it has raised $89M as it targets in vivo CAR-T and kidney delivery with novel lipid nanoparticles.
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Ryan Cross @scienceboss.bsky.social · 14/07/2026
Biogen's experimental Alzheimer's drug diranersen, which shuts down the production of tau, had mixed results in a Phase 2 study, with the lowest dose unexpectedly showing the greatest effect. My latest for @endpts.com digs into the data presented at #AAIC26. endpoints.news/biogens-tau-...
endpoints.news
Questions linger over Biogen's tau drug for Alzheimer's, as low dose reports better results
Biogen's tau-lowering diranersen slows Alzheimer's decline 26% at the lowest dose in Phase 2, but an inverse dose response and a missed endpoint cloud the data.
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Ryan Cross @scienceboss.bsky.social · 09/07/2026
ARPA-H has awarded 7 groups of scientists up to $160M total, over 5 years, to each develop multiple gene editing therapies and bring them to clinical testing. That's a tall order on a tight budget, and some scientists say its not enough. More in @endpts.com: endpoints.news/arpa-h-bookm...
endpoints.news
ARPA-H bookmarks $160M for custom gene editing treatments. Is it enough?
ARPA-H taps 7 teams for up to $160M to build bespoke gene editing drugs, betting on Baby KJ's playbook — but some scientists say funding falls short.
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Ryan Cross @scienceboss.bsky.social · 06/07/2026
When we evaluate biotech startups for inclusion in our annual Endpoints 11 list, we look for companies that are swinging for the fences with cutting-edge science, where success or failure will make a big dent. Nominations open until July 15: endpoints.news/nominations-...
endpoints.news
Nominations are open for the 2026 Endpoints 11 awards — submit by July 15
Endpoints opens nominations for its 2026 Endpoints 11 awards; submit standout private biotech startups by July 14 ahead of the Sept. 24 gala dinner.
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Ryan Cross @scienceboss.bsky.social · 01/07/2026
I'll be in London covering the #Alzheimers conference #AAIC26 for @endpts.com in less than two weeks. Send me a note if you'll be there and are presenting new data!
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Ryan Cross @scienceboss.bsky.social · 17/06/2026
Spot Bio has raised $40M to deliver genetic instructions for full-length dystrophin (the big muscle protein that's broken or missing in muscular dystrophy) with natural nanoparticles known as extracellular vesicles. My latest for @endpts.com has the details: endpoints.news/spot-bio-lau...
endpoints.news
Exclusive: Spot Bio launches with $40M to study mRNA therapy for muscular dystrophy
Spot Biosystems emerges from stealth with $40M raised, reporting early human data showing dystrophin restoration in two children with Duchenne muscular dystrophy.
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Ryan Cross @scienceboss.bsky.social · 16/06/2026
Kopra Bio is planning a trial in China to test a genetically engineered virus that helps expose brain tumors by releasing an inflammatory molecule that recruits immune cells. Read more about the approach and the company in my latest for @endpts.com endpoints.news/ucsf-spinout...
endpoints.news
Exclusive: UCSF spinout nets $9.1M to test virus therapy for brain cancer in China
UCSF spinout Kopra Bio has raised $9.1M to inject a genetically engineered virus into glioblastoma patients in a China trial.
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Ryan Cross @scienceboss.bsky.social · 03/06/2026
Lilly is partnering with Ascidian to develop RNA "exon editing" therapies for genetic kidney diseases (an interesting drug delivery challenge!) It's at least the 6th deal Lilly has struck in just over a week, reaching a total deal value of $10B. More in @endpts.com : endpoints.news/lilly-strike...
endpoints.news
Lilly strikes Ascidian deal worth up to $1.9B for RNA editing in kidney diseases
Last month, Ascidian Therapeutics presented the first data suggesting a new way to fix broken genes may be safe in people. Now Eli Lilly has struck a deal with the startup.
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Ryan Cross @scienceboss.bsky.social · 02/06/2026
In the hours since we published this, the Allen Institute has secured another $200 million from Bezos, AWS, NIH and the nonprofit EverythingALS, bringing the total to $400 million. They've also added Lewy body dementia as a fifth disease priroty. Details in the story.
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Ryan Cross @scienceboss.bsky.social · 02/06/2026
The @alleninstitute.org, long known for its focus on simply trying to understand how the brain works, is launching a $200 million initiative to translate its knowledge into drug development for neurodegenerative diseases. My story for @endpts.com has the details: endpoints.news/allen-instit...
endpoints.news
Allen Institute launches $200M effort to turn brain atlas lessons into medicines
The Allen Institute is launching a $200 million initiative to explore specific neurodegenerative diseases and even develop drugs for those conditions.
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Ryan Cross @scienceboss.bsky.social · 01/06/2026
Tune Tx's CRISPR-based epigenetic editing shows promise against chronic hepatitis B infections, and the company says its on track for a cure. I explain the novel technology and break down the company's biomarker data in my latest story for @endpts.com : endpoints.news/epigenetic-e...
endpoints.news
Epigenetic editing shows promise against chronic hep B infections
Tune Therapeutics' new method of CRISPR-based gene editing shows promise in curtailing chronic hepatitis B infections.
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Ryan Cross @scienceboss.bsky.social · 28/05/2026
At a time when most US gene editing companies have trimmed their pipelines, China-based YolTech Tx has brought six CRISPR therapies into the clinic. Now they've raised $70M to ramp up trials in China and the US. Read more in my exclusive for @endpts.com: endpoints.news/china-gene-e...
endpoints.news
Exclusive: China gene editing startup YolTech raises $70M to move CRISPR therapies forward
Yoltech Therapeutics, one of China’s most prolific gene editing companies has raised its biggest round of funding ahead of plans to go public in Hong Kong.
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Ryan Cross @scienceboss.bsky.social · 27/05/2026
New York City-based Waypoint Bio has raised a $20 million series A to run three CAR-T trials (investigator initiated trials) in China, with a focus on solid tumors (including some in vivo approaches). My latest for @endpts.com has the details: endpoints.news/waypoint-bio...
endpoints.news
Exclusive: Waypoint Bio raises $20M to run three CAR-T trials in China
New York City-based startup Waypoint Bio has raised $20 million in series A financing to test multiple cell therapies in China.
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